Method for homogeneously mixing uranium/plutonium mixed oxide
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United States of America Patent
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Aug 22, 2000
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N/A
app pub date -
Sep 9, 1998
filing date -
Oct 2, 1997
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Abstract
A method for homogeneously mixing a uranium/plutonium mixed oxide which is used for the preparation of a uranium/plutonium mixed oxide fuel. The method comprises weighing a uranium oxide powder, a plutonium oxide powder, and a dry recovered powder prepared by grinding a uranium/plutonium mixed oxide sinter so as to give a predetermined plutonium enrichment; roughly mixing these powders together by means of a mixer; pulverizing and homogeneously mixing the roughly mixed powder by means of a jet mill; discharging the homogeneously mixed powder together with compressed air from the jet mill; and separating the mixed powder from the air by means of a first-stage cyclone to recover at least 90% of the discharged powder.
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